I doubt the beats could be worth that much money.
For that price one could get 2 pairs of top of the range Shures or Sennheisers or even a pair of B&Ws. I'm sure they're good, but how much of the price is linked to the fact that they are endorsed by Dre.
Tate, my best earbuds were the Shure noise cancelling ones. They died a few month's ago though, when I accidently let one get wet. Now only the right side plays.
For a pair of good budget buds (less than R500) go for the Sennheiser CX300 or the Griffin Tunebuds. The tunebuds are about R300, but the sound is not bad at all, especially if you are just using them for listening on your iPod. If it is for use with high Fi or something go for the shure.